Question

Is it possible hide some controls and show other controls at run time?

Answer

Hiding and disabling controls is readily available. The following example hides a TextBox named TextBox1 and show a button named HiddenButton that is presumed currently hidden.

(defun c:DclForm1_Button_Clicked ()
   ; hide the text box
   (Odcl_Control_SetProperty TestProject_DclForm1_TextBox1 "Visible" 0)
   ; show the hidden button
   (Odcl_Control_SetProperty TestProject_DclForm1_HiddenButton "Visible" T)
)